`sintheta+sin2theta+sin4theta+sin5theta=0`

sin2theta-sin4theta+sin6theta=0

sin2theta+sin4theta=sin6theta

sintheta+sin7theta=sin4theta

Solve: 4sintheta sin2theta sin4theta = sin 3theta

Solve the following equation: sintheta+sin2theta+sin3theta+sin4theta=0

sin5theta+sin3theta+sintheta=0

Sum to terms of the series sintheta sin2theta + sin2thetasin3theta + sin3theta sin4theta +..... is equal to

sin5theta + sin2theta=0

sin theta +sin 2theta+sin3theta+sin4theta=0

Prove that sin theta+sin2 theta+sin4 theta+sin5 theta=4cos((theta)/(2))cos((3 theta)/(2))sin3 theta